Is there any method provided by quartz to get total number of misfiers, I am aware about a way, with the help of listeners we can identify the misfier occured by the job, but it would be helpful if I can get total misfier count by all the jobs.
I gone throgh the quartz documentation, but didn't find any solution for the same.
Quartz scheduler API does not provide any method that returns the total number of misfires since its restart. You will need to implement a TriggerListener and implement its triggerMisfired method and do the counting.
Alternatively, you can use QuartzDesk (I am biased here) or some other Quartz GUI manager that provides this information for you in the GUI, through an API or via a simple SQL query.
Related
I am modeling ticket system with various SLA. The model must contain several service blocks with different reaction time ( from 2 to 32 hours). In the service block only working hours should be taken into account. So in the service block timeout should stop when non-workong hours and on the weekend. Could you please kindly tell me how i can realize it?
Thank you very much in advance!
I can think of two answers, one simplified but works in many cases, the other more advanced and probably more accurate:
Simplified approach: I would set the model in hours and keep everything running as is without any stop. So, at the end of the simulation, if the total time is 100 hours and you know that you have 8 hours/day with 5 days/week, then you'd know the total duration is 2.5 weeks. Of course, this might have limitations or might become more complex later on if you want day-specific actions (e.g. you want to differentiate between Monday, Tuesday, etc.)
Advanced more accurate approach: Create resources whose capacities are defined by schedule and assigned them to your services. Create a schedule and specify the working hours in that schedule. Check the below link to learn more about schedules. I call this the more advanced approach because you need to make sure the schedule is defined correctly and make sure all elements in the model are properly controlled (e.g. non-service blocks such as source, delays, etc.).
https://help.anylogic.com/topic/com.anylogic.help/html/data/schedule.html?resultof=%22%73%63%68%65%64%75%6c%65%73%22%20%22%73%63%68%65%64%75%6c%22%20
I personally would use the first approach if the model is rather simple and modeling working hours is enough for analysis. Otherwise, I'd go for option 2.
Finally, another option I'd like to highlight is the "suspend/resume" functions. I am only adding this because you asked "how to stop timeout". So these functions specifically stop and resume timeout. But you'll need to define the times at which they are executed (through an event for example).
Say i have job which needs to be executed at fixed times in a day like below,
"05:00, 06:10, 07:30, 08:15, 09:05, 10:35"
How could i build a Trigger for this in Quartz ?
I couldnt find the way to achieve this out-of-the-box.
I see two ways to solve your problem:
1. Multiple triggers (recommended).
The most obvious and easy way to set the unusual scheduling for you job is to combine several triggers.
Quartz allows to set as much triggers as you want for single JobDetail.
2. Implement your own trigger.
It is more complicated way, applicable only if you must use only one trigger.
You could implement org.quartz.Trigger interface or any subinterfaces to set yourown rules.
I want to run a plug-in every 30 minutes, to poll an external system for changes. I am in CRM Online, so I don't have ready access to a scheduling engine.
To run the plug-in, I have a 'trigger' entity with a timezone independent date-
Updating the field also triggers a workflow, which in pseudocode has this logic:
If (Trigger_WaitUntil >= [Process-Execution Time])
{
Timeout until Trigger:WaitUntil
{
Set Trigger_WaitUntil to [Process-Execution Time] + 30 minutes
Stop Workflow with status of: Succeeded
}
}
If Trigger_WaitUntil < [Process-Execution Time])
{
Send email //Tell an admin that the recurring task has self-terminated
Stop Workflow with status of: Canceled
}
So, the behaviour I expect is that every 30 minutes, the 'WaitUntil' field gets updated (and the Plug-in and workflow get triggered again); unless the WaitUntil date is before the Execution time, in which case stop the workflow.
However, 4 hours or so later (probably 8 executions, although I haven't verified that yet) I get an infinite loop warning "This workflow job was canceled because the workflow that started it included an infinite loop. Correct the workflow logic and try again. For information about workflow".
My question is why? Do workflows have a correlation id like plug-ins, which is being carried through to the child workflow? If so, is there anyway I can prevent this, whilst maintaining the current basic mechanism of using a single trigger record to manage the schedule (I've seen other solutions in which workflows create new records, but then you've got to go round tidying up the old trigger records as well)
Yes, this behavior is well-known. The only way to implement recurring workflows without issues with infinite loops in Dynamics CRM and using only OOB features is usage of Bulk Deletion functionality. This article describes how to implement it - http://www.crmsoftwareblog.com/2012/08/using-the-bulk-deletion-process-to-schedule-recurring-workflows/
UPD: If you want to run your code every 30 mins then you will have to create 48 bulkdelete jobs with correspond startdatetime like 12:00, 12: 30, 1:00 ...
The current supported method for CRM is to use the Azure Scheduler.
Excerpt:
create a Web API application to communicate with CRM and our external
provider running on a shared (free) Azure web site and also utilize
the Azure Scheduler to manage the recurrence pattern.
The free version of the Azure Scheduler limits us to execution no more
than once an hour and a maximum of 5 jobs. If you have a lot going on
$20 a month will get you executions every minute and up to 50 jobs -
which sounds like a pretty good deal.
so if you wanted every 30 minutes, you could create two jobs, one on the half hour, and one on the hour.
The Bulk Deletion is an interesting work around and something we've used before. It creates extra work and maintenance though so I try to avoid it if possible.
I would generally recommend building a windows application and using the windows scheduling feature (I know you said you don't have a scheduler available but this is often forgotten). This approach works really well and is very easy to troubleshoot. Writing to logs and sending error email alerts is pretty easy to make it robust. The server doesn't need to be accessible externally, it only needs to reach CRM. If you had CRM on-prem, you could just use the same server.
Azure Scheduler is a great suggestion. This keeps you in the cloud which is nice.
SSIS is another option if you already have KingswaySoft or Cozy Roc in place.
You could build a workflow that creates another record and cleans up after itself; however, this is really using the wrong tool for the job. Also, it's very easy for it to fail and then not initiate the next record.
There is a solution called "Scheduled Workflow Runner". You create a FetchXML query to create a record set to run against, and point it at an on-demand workflow that you want it to run on each record.
http://alexanderdevelopment.net/post/2013/05/18/scheduling-recurring-dynamics-crm-workflows-with-fetchxml/
I'm working on a project with Quartz and has been a problem with the dependencies with jobs.
we have a setup where A and B aren't dependent on eachother, though C is:
A and B can run at the same time, but C can only run when both A and B are complete.
Is there a way to set this kind of scenario up in Quartz, so that C will only trigger when A and B finish?
Not directly AFAIK, but it should be not too hard to use a TriggerListener to implement such a functionality (a TriggerListener is run both a start and end of jobs, and you can set them up for individual triggers or trigger groups).
EDIT: there is even a specific FAQ Topic about this problem:
There currently is no "direct" or "free" way to chain triggers with
Quartz. However there are several ways you can accomplish it without
much effort. Below is an outline of a couple approaches:
One way is to use a listener (i.e. a TriggerListener, JobListener or
SchedulerListener) that can notice the completion of a job/trigger and
then immediately schedule a new trigger to fire. This approach can get
a bit involved, since you'll have to inform the listener which job
follows which - and you may need to worry about persistence of this
information. See the listener
org.quartz.listeners.JobChainingJobListener which ships with Quartz -
as it already has some of this functionality.
Another way is to build a Job that contains within its JobDataMap the
name of the next job to fire, and as the job completes (the last step
in its execute() method) have the job schedule the next job. Several
people are doing this and have had good luck. Most have made a base
(abstract) class that is a Job that knows how to get the job name and
group out of the JobDataMap using pre-defined keys (constants) and
contains code to schedule the identified job. This abstract Job's
implementation of execute() delegates to an abstract template method
such as "doWork()" (where the extending Job class's real work goes)
and then it contains the code for scheduling the follow-up job. Then
they simply make extensions of this class that included the work the
job should do. The usage of 'durable' jobs, or the overloaded
addJob(JobDetail, boolean, boolean) method (added in Quartz 2.2) helps
the application define all the jobs at once with their proper data,
without yet creating triggers to fire them (other than one trigger to
fire the first job in the chain).
In the future, Quartz will provide a much cleaner way to do this, but
until then, you'll have to use one of the above approaches, or think
of yet another that works better for you.
I'll try and keep it simple : I've started using Arena Simulation for studies purposes, and up until now, I've been unable to find any conclusive documentation or tutorial as to how to create a Job Shop, if you could direct me to specific and practical documentation, or otherwise a helpful example which could get me started , that would be most helpful.
My problem : A given number of jobs must be processed through a given number of ressources (machines), each job has a different route to take, and each one has a different work-time depending on the resource it is using.
Ex : For job_1 to be finished, it must first use ressource_1 with 5 seconds execution-time, then ressource_3 with 3 seconds execution-time and finally ressource_9 with 1 second execution-time. Of course, a different job has a totally different route and different execution-times.
Here's an MS thesis I found...
http://www.scribd.com/doc/54342479/Simulation-of-Job-Shop-using-Arena-Mini-Project-Report
ADDENDUM:
The basic idea is to use ASSIGN to label the jobs with attribute variables reflecting their routing requirements. Those attributes can be read and used by decision blocks to route the job to the appropriate next workstation or to the exit. Perhaps these notes will be more useful to you than the MS thesis cited above. That's about all I can give you since I haven't used Arena for several years now -- I no longer have access to it and can't put together any specific examples.